Before:
  call ale#test#SetDirectory('/testplugin/test')
  call ale#test#SetFilename('dummy.txt')

  let g:old_filename = expand('%:p')
  let g:Callback = ''
  let g:expr_list = []
  let g:message_list = []
  let g:handle_code_action_called = 0
  let g:code_actions = []
  let g:options = {}
  let g:capability_checked = ''
  let g:conn_id = v:null
  let g:InitCallback = v:null

  runtime autoload/ale/lsp_linter.vim
  runtime autoload/ale/lsp.vim
  runtime autoload/ale/util.vim
  runtime autoload/ale/filerename.vim
  runtime autoload/ale/code_action.vim

  function! ale#lsp_linter#StartLSP(buffer, linter, Callback) abort
    let g:conn_id = ale#lsp#Register('executable', '/foo/bar', {})
    call ale#lsp#MarkDocumentAsOpen(g:conn_id, a:buffer)

    if a:linter.lsp is# 'tsserver'
        call ale#lsp#MarkConnectionAsTsserver(g:conn_id)
    endif

    let l:details = {
    \ 'command': 'foobar',
    \ 'buffer': a:buffer,
    \ 'connection_id': g:conn_id,
    \ 'project_root': '/foo/bar',
    \}

    let g:InitCallback = {-> ale#lsp_linter#OnInit(a:linter, l:details, a:Callback)}
  endfunction

  function! ale#lsp#HasCapability(conn_id, capability) abort
    let g:capability_checked = a:capability

    return 1
  endfunction

  function! ale#lsp#RegisterCallback(conn_id, callback) abort
    let g:Callback = a:callback
  endfunction

  function! ale#lsp#Send(conn_id, message) abort
    call add(g:message_list, a:message)

    return 42
  endfunction

  function! ale#util#Execute(expr) abort
    call add(g:expr_list, a:expr)
  endfunction

  function! ale#code_action#HandleCodeAction(code_action, options) abort
    let g:handle_code_action_called = 1
    Assert get(a:options, 'should_save')
    call add(g:code_actions, a:code_action)
  endfunction

  function! ale#util#Input(message, value, completion) abort
    return 'a-new-name'
  endfunction

  call ale#filerename#SetMap({
  \  3: {
  \    'old_name': 'oldName',
  \    'new_name': 'aNewName',
  \  },
  \})

After:
  if g:conn_id isnot v:null
    call ale#lsp#RemoveConnectionWithID(g:conn_id)
  endif

  call ale#filerename#SetMap({})
  call ale#test#RestoreDirectory()
  call ale#linter#Reset()

  unlet! g:capability_checked
  unlet! g:InitCallback
  unlet! g:old_filename
  unlet! g:conn_id
  unlet! g:Callback
  unlet! g:message_list
  unlet! g:expr_list
  unlet! b:ale_linters
  unlet! g:options
  unlet! g:code_actions
  unlet! g:handle_code_action_called

  runtime autoload/ale/lsp_linter.vim
  runtime autoload/ale/lsp.vim
  runtime autoload/ale/util.vim
  runtime autoload/ale/filerename.vim
  runtime autoload/ale/code_action.vim

Execute(Other messages for the tsserver handler should be ignored):
  call ale#filerename#HandleTSServerResponse(1, {'command': 'foo'})
  AssertEqual g:handle_code_action_called, 0

Execute(Failed file rename responses should be handled correctly):
  call ale#filerename#SetMap({3: {'old_name': 'oldName', 'new_name': 'a-test'}})
  call ale#filerename#HandleTSServerResponse(
  \ 1,
  \ {'command': 'getEditsForFileRename', 'request_seq': 3}
  \)
  AssertEqual g:handle_code_action_called, 0

Given typescript(Some typescript file):
  foo
  somelongerline
  bazxyzxyzxyz

Execute(Code actions from tsserver should be handled):
  call ale#filerename#HandleTSServerResponse(1, {
  \ 'command': 'getEditsForFileRename',
  \ 'seq': 0,
  \ 'request_seq': 3,
  \ 'type': 'response',
  \ 'success': v:true,
  \ 'body': [
  \   {
  \     'fileName': '/foo/bar/file1.tsx',
  \     'textChanges': [
  \       {
  \         'end': {'offset': 55, 'line': 22},
  \         'newText': './file2',
  \         'start': {'offset': 34, 'line': 22},
  \       }
  \     ]
  \   }
  \ ],
  \})

  AssertEqual
  \ [
  \   {
  \     'description': 'filerename',
  \     'changes': [
  \       {
  \         'fileName': '/foo/bar/file1.tsx',
  \         'textChanges': [
  \           {
  \             'end': {'offset': 55, 'line': 22},
  \             'newText': './file2',
  \             'start': {'offset': 34, 'line': 22},
  \           }
  \         ]
  \       }
  \     ],
  \   }
  \ ],
  \ g:code_actions

Execute(HandleTSServerResponse does nothing when no data in filerename_map):
  call ale#filerename#HandleTSServerResponse(1, {
  \ 'command': 'getEditsForFileRename',
  \ 'request_seq': -9,
  \ 'success': v:true,
  \ 'body': {}
  \})

  AssertEqual g:handle_code_action_called, 0

Execute(Prints a tsserver error message when unsuccessful):
  call ale#filerename#HandleTSServerResponse(1, {
  \ 'command': 'getEditsForFileRename',
  \ 'request_seq': 3,
  \ 'success': v:false,
  \ 'message': 'This file cannot be renamed',
  \})

  AssertEqual g:handle_code_action_called, 0
  AssertEqual ['echom ''Error renaming file "oldName" to "aNewName". ' .
  \ 'Reason: This file cannot be renamed'''], g:expr_list

Execute(Does nothing when no changes):
  call ale#filerename#HandleTSServerResponse(1, {
  \ 'command': 'getEditsForFileRename',
  \ 'request_seq': 3,
  \ 'success': v:true,
  \ 'body': [],
  \})

  AssertEqual g:handle_code_action_called, 0
  AssertEqual ['echom ''No changes while renaming "oldName" to "aNewName"'''], g:expr_list

Execute(tsserver file rename requests should be sent):
  call ale#filerename#SetMap({})
  call ale#linter#Reset()

  runtime ale_linters/typescript/tsserver.vim
  call setpos('.', [bufnr(''), 2, 5, 0])

  ALEFileRename

  " We shouldn't register the callback yet.
  AssertEqual '''''', string(g:Callback)

  AssertEqual type(function('type')), type(g:InitCallback)
  call g:InitCallback()

  AssertEqual 'filerename', g:capability_checked
  AssertEqual
  \ 'function(''ale#filerename#HandleTSServerResponse'')',
  \ string(g:Callback)
  AssertEqual
  \ [
  \   ale#lsp#tsserver_message#Change(bufnr('')),
  \   [0, 'ts@getEditsForFileRename', {
  \     'oldFilePath': expand('%:p'),
  \     'newFilePath': 'a-new-name',
  \   }]
  \ ],
  \ g:message_list
  AssertEqual {'42': {'old_name': expand('%:p'), 'new_name': 'a-new-name'}},
  \ ale#filerename#GetMap()